Physics for IGCSE & O level - Thermal Effects (Section 4 - No. 48)
How does convection work in a hot water heating system?
Hot water sinks, and cold water rises.
Hot water rises, and cold water sinks.
Water remains at a constant temperature.
The water molecules don't move.
Giải thích
Hot water is less dense and rises, while cooler water sinks, creating a cycle.